Hairbrush



FIG. 1 is a perspective view of a hairbrush showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a right end elevational view thereof; and

FIG. 5 is a side elevational view thereof with bristles removed for clarity of illustration only. 

The ornamental design for a hairbrush, as shown. 